Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/2113

Title:

OPAL: open pool Australian light-water reactor.

Keywords:

ANSTOOPAL ReactorScatteringIrradiationNeutronsRadiopharmaceuticals

Issue Date:

Jun-2005

Publisher:

Australian Nuclear Science and Technology Organisation

Abstract:

The construction of Australia’s new world-class research reactor, OPAL, heralds the
nation’s determination to maintain its position at the frontiers of international science. OPAL will become the centre-piece of the facilities we offer at ANSTO, where we
apply our nuclear expertise to support health, environmental, industrial and national security objectives. Since 1958, Australia has benefited from the nuclear capabilities of HIFAR, the High Flux Australian Reactor, and the nuclear-based science of ANSTO and its forebears. We provide high-quality radiopharmaceuticals for nuclear medicine, irradiate silicon for
advanced electronics applications and produce radioisotopes for environmental,
medical and industrial uses including non-destructive testing methods. Australian researchers and their counterparts from around the world use the unique insights afforded by neutron beam science to increase our fundamental scientific knowledge and assist our industries. Our nuclear expertise also enables us to make an important international contribution through groups such as the Forum for Nuclear Cooperation in Asia, which promotes the safe and peaceful use of nuclear technology in the Asian region. The OPAL reactor will outperform HIFAR in every aspect, making radiopharmaceutical and radioisotope production, irradiation services and neutron beam research quicker and more efficient. It can operate 340 days a year, a significant increase over the operating levels typically achieved by comparable overseas facilities.
The new reactor uses low enriched uranium fuel with around 20 per cent uranium-235.
In terms of nuclear security and safeguards, this is a distinct advantage over earlier
nuclear reactors, some of which required as much as 95 per cent enriched uranium. A state-of-the-art research reactor, OPAL uses heavy water to moderate the neutrons
produced in its fuel assemblies and light water for cooling. A ‘cold’ neutron source will produce neutrons with lower energy levels and longer wavelengths, significantly enhancing the versatility of the reactor’s neutron beam scattering facilities. Neutron guides, which function rather like optical fibre, are used to transport the useful neutrons to experiments, thereby removing unwanted highenergy neutrons and gamma radiation. To maximise scientific use of the OPAL reactor and to attract researchers who have not previously used neutron techniques, ANSTO has established the Bragg Institute
as a regional centre of excellence in neutron science. The Bragg Institute is
Australia’s leading group in the use of neutron scattering and X-ray techniques to
solve complex research and industrial problems. The Institute is named in honour of
Australians William and Lawrence Bragg, who jointly won the 1915 Nobel Prize for Physics.
In recognition of the complementary nature of neutron and X-ray techniques, ANSTO
has also invested $5 million in beamlines at the Australian Synchrotron being built in
Melbourne by the Victorian Government.
This publication explains the capabilities of OPAL and some of the many ways in
which it will bring benefits to Australia and our international relationships.